IVY Classic 46330 5/8 x 18-Inch Nail-Cutting Ship Auger, High-Grade Alloy-Steel, 1/Tube Designed to cut holes in nail-embedded wood, plywood, hard wood and soft wood, Swift Bore (Registered Trademark) 7/16-Inch power hex shank for secure chuck grip Self-feeding screw for fast boring. Cutting edge can be sharpened Heat-treated and tempered high-grade alloy-steel Diameter: 5/8-inch, Length: 18-inch, Shank: 7/16-inch power hex